First Synthesis and Characterization of CH 4 @C 60
First Synthesis and Characterization of CH 4 @C 60
复制标题
CH 4 @C 60 的首次合成与表征
DOI：
10.1002/ange.201900983
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发表时间：
2019
影响因子：
--
通讯作者：
Bloodworth S
中科院分区：
文献类型：
--
作者：
Bloodworth S
首次合成了内嵌式富勒烯CH4@C60，其中每个c60富勒烯笼包覆一个甲烷分子。甲烷是迄今为止第一个，也是最大的，被封装在c60中的有机分子。关键的孔收缩步骤，一个开放的富勒烯的光化学脱硫，完成，即使它是由内嵌分子抑制。与c60类似物相比，镍（II）八烷基卟啉/苯溶剂溶剂的晶体结构没有明显的碳笼畸变，并且甲烷氢以电子密度的壳层形式围绕在中心碳周围，表明甲烷的量子性质。内腔甲烷的1h自旋晶格弛豫时间（T1）与在气相中观察到的相似，表明甲烷在c60笼内自由旋转。CH4@C60opens的合成是一条合成含有大分子和原子的内富勒烯的途径。
The endohedral fullerene CH4@C60, in which each C60fullerene cage encapsulates a single methane molecule, has been synthesized for the first time. Methane is the first organic molecule, as well as the largest, to have been encapsulated in C60to date. The key orifice contraction step, a photochemical desulfinylation of an open fullerene, was completed, even though it is inhibited by the endohedral molecule. The crystal structure of the nickel(II) octaethylporphyrin/ benzene solvate shows no significant distortion of the carbon cage, relative to the C60analogue, and shows the methane hydrogens as a shell of electron density around the central carbon, indicative of the quantum nature of the methane. The1H spin‐lattice relaxation times (T1) for endohedral methane are similar to those observed in the gas phase, indicating that methane is freely rotating inside the C60cage. The synthesis of CH4@C60opens a route to endofullerenes incorporating large guest molecules and atoms.